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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.richfaces.component;

import java.util.ArrayList;
import java.util.List;

import javax.faces.component.UIComponent;
import javax.faces.component.UIComponentBase;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.event.ComponentSystemEventListener;
import javax.faces.event.ListenerFor;
import javax.faces.event.PostAddToViewEvent;

import org.ajax4jsf.component.behavior.AjaxBehavior;
import org.ajax4jsf.renderkit.AjaxRendererUtils;
import org.richfaces.cdk.annotations.Attribute;
import org.richfaces.cdk.annotations.JsfComponent;
import org.richfaces.cdk.annotations.JsfRenderer;
import org.richfaces.cdk.annotations.Tag;
import org.richfaces.cdk.annotations.TagType;

/**
 * @author Nick Belaevski
 *
 */
@JsfComponent(renderer=@JsfRenderer(type="org.richfaces.AttachQueueRenderer"),
    tag = @Tag(name = "attachQueue",
        handler = "org.richfaces.view.facelets.html.AttachQueueHandler",
        
        generate = false, type = TagType.Facelets)
)
@ListenerFor(systemEventClass = PostAddToViewEvent.class)
public abstract class AbstractAttachQueue extends UIComponentBase implements ComponentSystemEventListener {

    public static final String COMPONENT_TYPE = "org.richfaces.AttachQueue";
    
    public static final String COMPONENT_FAMILY = "org.richfaces.AttachQueue";
    
    private transient List componentsToAssociate;
    
    private transient List behaviorsToAssociate;
    
    @Attribute
    public abstract String getRequestGroupingId();

    @Attribute
    public abstract int getRequestDelay();

    @Attribute
    public abstract int getTimeout();

    @Attribute
    public abstract boolean isIgnoreDupResponses();

    @Attribute
    public abstract String getOnrequestqueue();

    @Attribute
    public abstract String getOnrequestdequeue();
    
    @Attribute
    public abstract String getName();

    public String getQueueId() {
        return getName();
    }
    
    @Override
    public String getFamily() {
        return COMPONENT_FAMILY;
    }

    private static void immediateAssociateWith(UIComponent component, String queueId) {
        component.getAttributes().put(AjaxRendererUtils.QUEUE_ID_ATTRIBUTE, queueId);
    }

    private static void immediateAssociateWith(AjaxBehavior behavior, String queueId) {
        behavior.setQueueId(queueId);
    }
    
    /**
     * Establishes association between attachQueue component and component passed as method argument.
     * Association can be established either immediately just before returning from this method, or postponed
     * until attachQueue component will be added to view.
     * 
     * @param component
     */
    public void associateWith(UIComponent component) {
        if (isInView()) {
            immediateAssociateWith(component, getClientId());
        } else {
            if (componentsToAssociate == null) {
                componentsToAssociate = new ArrayList(2);
            }
            
            componentsToAssociate.add(component);
        }
    }
    
    /**
     * Establishes association between attachQueue component and behavior passed as method argument.
     * Association can be established either immediately just before returning from this method, or postponed
     * until attachQueue component will be added to view.
     * 
     * @param behavior
     */
    public void associateWith(AjaxBehavior behavior) {
        if (isInView()) {
            immediateAssociateWith(behavior, getClientId());
        } else {
            if (behaviorsToAssociate == null) {
                behaviorsToAssociate = new ArrayList(2);
            }

            behaviorsToAssociate.add(behavior);
        }
    }
    
    @Override
    public void processEvent(ComponentSystemEvent event) throws AbortProcessingException {
        super.processEvent(event);
        
        if (event instanceof PostAddToViewEvent) {
            String queueId = getClientId();
            
            if (componentsToAssociate != null) {
                for (UIComponent componentToAssociate : componentsToAssociate) {
                    immediateAssociateWith(componentToAssociate, queueId);
                }
                
                componentsToAssociate = null;
            }
            
            if (behaviorsToAssociate != null) {
                for (AjaxBehavior ajaxBehavior : behaviorsToAssociate) {
                    immediateAssociateWith(ajaxBehavior, queueId);
                }
                
                behaviorsToAssociate = null;
            }
        }
    }
}